mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-10 03:19:40 +00:00
api changes and render/ghost functions
Original commit message from CVS: api changes and render/ghost functions
This commit is contained in:
parent
ec9444bae9
commit
e22f481f62
3 changed files with 74 additions and 16 deletions
|
@ -1,4 +1,4 @@
|
|||
librarydir = $(prefix)/lib/gst
|
||||
librarydir = $(prefix)/lib
|
||||
|
||||
library_LTLIBRARIES = libgstgconf.la
|
||||
|
||||
|
|
|
@ -19,6 +19,44 @@ gst_gconf_get_client (void)
|
|||
|
||||
return _gst_gconf_client;
|
||||
}
|
||||
/* go through a bin, finding the one pad that is unconnected in the given
|
||||
* * direction, and return that pad */
|
||||
GstPad *
|
||||
gst_bin_find_unconnected_pad (GstBin *bin, GstPadDirection direction)
|
||||
{
|
||||
GstPad *pad = NULL;
|
||||
GList *elements = NULL;
|
||||
GList *pads = NULL;
|
||||
GstElement *element = NULL;
|
||||
|
||||
g_print ("DEBUG: find_unconnected start\n");
|
||||
elements = (GList *) gst_bin_get_list (bin);
|
||||
/* traverse all elements looking for unconnected pads */
|
||||
while (elements && pad == NULL)
|
||||
{
|
||||
element = GST_ELEMENT (elements->data);
|
||||
g_print ("DEBUG: looking in element %s\n", gst_element_get_name (element));
|
||||
pads = gst_element_get_pad_list (element);
|
||||
while (pads)
|
||||
{
|
||||
/* check if the direction matches */
|
||||
if (GST_PAD_DIRECTION (GST_PAD (pads->data)) == direction)
|
||||
{
|
||||
if (GST_PAD_PEER (GST_PAD (pads->data)) == NULL)
|
||||
{
|
||||
/* found it ! */
|
||||
g_print ("DEBUG: found an unconnected pad !\n");
|
||||
pad = GST_PAD (pads->data);
|
||||
}
|
||||
}
|
||||
if (pad) break; /* found one already */
|
||||
pads = g_list_next (pads);
|
||||
}
|
||||
elements = g_list_next (elements);
|
||||
}
|
||||
g_print ("DEBUG: find_unconnected stop\n");
|
||||
return pad;
|
||||
}
|
||||
|
||||
/* external functions */
|
||||
|
||||
|
@ -47,27 +85,47 @@ gst_gconf_set_string (const gchar *key, const gchar *value)
|
|||
gconf_client_set_string (gst_gconf_get_client (), key, value, NULL);
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_gconf_render_bin (const gchar *key, GstElement **element)
|
||||
/* this function renders the given description to a bin,
|
||||
* and ghosts at most one unconnected src pad and one unconnected sink pad */
|
||||
GstElement *
|
||||
gst_gconf_render_bin_from_description (const gchar *description)
|
||||
{
|
||||
GstElement *bin;
|
||||
gchar *pipeline;
|
||||
GstElement *bin = NULL;
|
||||
GstPad *pad = NULL;
|
||||
GError *error = NULL;
|
||||
gchar *value = NULL;
|
||||
|
||||
value = gst_gconf_get_string (key);
|
||||
|
||||
pipeline = g_strdup_printf ("bin.( %s )", value);
|
||||
bin = GST_ELEMENT (gst_parse_launch (pipeline, &error));
|
||||
/* parse the pipeline */
|
||||
bin = GST_ELEMENT (gst_parse_launch (description, &error));
|
||||
if (error)
|
||||
{
|
||||
g_print ("DEBUG: gstgconf: error parsing pipeline %s\n%s\n",
|
||||
pipeline, error->message);
|
||||
description, error->message);
|
||||
g_error_free (error);
|
||||
return FALSE;
|
||||
return NULL;
|
||||
}
|
||||
*element = bin;
|
||||
return TRUE;
|
||||
|
||||
/* find pads and ghost them if necessary */
|
||||
if ((pad = gst_bin_find_unconnected_pad (GST_BIN (bin), GST_PAD_SRC)))
|
||||
gst_element_add_ghost_pad (bin, pad, "src");
|
||||
if ((pad = gst_bin_find_unconnected_pad (GST_BIN (bin), GST_PAD_SINK)))
|
||||
gst_element_add_ghost_pad (bin, pad, "sink");
|
||||
return bin;
|
||||
}
|
||||
|
||||
/* this function reads the gconf key, parses the pipeline bit to a bin,
|
||||
* and ghosts at most one unconnected src pad and one unconnected sink pad */
|
||||
GstElement *
|
||||
gst_gconf_render_bin_from_key (const gchar *key)
|
||||
{
|
||||
GstElement *bin;
|
||||
gchar *description;
|
||||
gchar *value = NULL;
|
||||
|
||||
value = gst_gconf_get_string (key);
|
||||
description = g_strdup_printf ("bin.( %s )", value);
|
||||
bin = gst_gconf_render_bin_from_description (description);
|
||||
g_free (description);
|
||||
return bin;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
@ -12,8 +12,8 @@ gchar * gst_gconf_get_string (const gchar *key);
|
|||
void gst_gconf_set_string (const gchar *key,
|
||||
const gchar *value);
|
||||
|
||||
gboolean gst_gconf_render_bin (const gchar *key,
|
||||
GstElement **element);
|
||||
GstElement * gst_gconf_render_bin_from_key (const gchar *key);
|
||||
GstElement * gst_gconf_render_bin_from_description (const gchar *description);
|
||||
|
||||
/*
|
||||
guint gst_gconf_notify_add (const gchar *key,
|
||||
|
|
Loading…
Reference in a new issue